Optimizing the physical properties of cobalt/graphene nanocomposites for technological applications

Cobalt nanoferrites with formula CoFe 2 O 4 , and CoFe 2 O 4 /GR were synthesized using a citrate auto-combustion method. The prepared samples were characterized by X-ray diffraction, scanning electron microscopy (SEM) and the Fourier-transform infrared (FTIR) spectroscopy. The dependence of structu...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2019-08, Vol.125 (8), p.1-8, Article 516
Main Authors: Ateia, Ebtesam E., Abdelamksoud, M. K., Arman, M. M., Ramadan, Rania, Shafaay, Amira S.
Format: Article
Language:English
Subjects:
Applied physics
Characterization and Evaluation of Materials
Cobalt ferrites
Coercivity
Condensed Matter Physics
Dependence
Energy gap
Fourier transforms
Graphene
Kubelka-Munk equations
Machines
Magnetic properties
Magnetic saturation
Magnetization
Magnets
Manufacturing
Materials science
Nanocomposites
Nanoparticles
Nanotechnology
Optical and Electronic Materials
Optical properties
Physical properties
Physics
Physics and Astronomy
Processes
Scanning electron microscopy
Surfaces and Interfaces
Thin Films
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Summary:Cobalt nanoferrites with formula CoFe 2 O 4 , and CoFe 2 O 4 /GR were synthesized using a citrate auto-combustion method. The prepared samples were characterized by X-ray diffraction, scanning electron microscopy (SEM) and the Fourier-transform infrared (FTIR) spectroscopy. The dependence of structure, magnetic and optical properties of cobalt/graphene nanocomposites on the graphene content was studied. The obtained data show that the CoFe 2 O 4 nanoparticles are homogenously decorated on the graphene layers, which act as magnetically inactive layers in turn affecting the magnetization. The high coercivity H c values reflect that CoFe 2 O 4 /GR nanocomposites are hard magnets at room temperature. The energy band gap of the cobalt/graphene is estimated using Kubelka–Munk equation. The energy gap of the investigated nanocomposites was found about 1.4 eV for direct transition. The samples with high saturation magnetization values can affect by the external magnetic field, which is favorable to their application in high adsorption capacity.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-019-2815-2